DRIVERS-2855: Skip $out and mapReduce tests on serverless (#1550)

This was missed in bfb6a84

Author: jmikola

source/read-write-concern/tests/operation/default-write-concern-3.4.json

@@ -3,7 +3,7 @@
 
 description: default-write-concern-3.4
 
-schemaVersion: "1.0"
+schemaVersion: "1.4"
 
 runOnRequirements:
   - minServerVersion: "3.4"
@@ -40,6 +40,9 @@ initialData:
 tests:
   -
     description: Aggregate with $out omits default write concern
+    # Serverless does not support $out stage
+    runOnRequirements:
+      - serverless: forbid
     operations:
       -
         object: *collection0
@@ -116,6 +119,9 @@ tests:
                 writeConcern: { $$exists: false }
   -
     description: MapReduce omits default write concern
+    # Serverless does not support mapReduce operation
+    runOnRequirements:
+      - serverless: forbid
     operations:
       -
         name: mapReduce